In 1947, Ludlow published Latter-day Prophets Speak, a compilation of the teachings of various leaders of The Church of Jesus Christ of Latter-day Saints (LDS Church). Ludlow joined BYU's faculty in 1955. He served for a time as the dean of Religious Education at BYU. In 1968, Ludlow headed the group of BYU students who were the first to go to the Holy Land under BYU auspices.[3]